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Brand: MOXA
Moxa EDS-508A 8-Port Managed Ethernet Switch
Description
Eight-port managed switching with security features
The Moxa EDS-508A is a standalone eight-port managed Ethernet switch built around Turbo Ring and Turbo Chain redundancy (recovery time below 20 ms at 250 switches) with STP, RSTP and MSTP for other topologies. Compared with entry-level switches it adds TACACS+, RADIUS, IEEE 802.1X, SSH and HTTPS, link aggregation with LACP, two relay alarm outputs and two digital inputs, which suit plant networks where access control and fault signalling matter. It is configured through a web browser, CLI, Telnet or serial console, a Windows utility or the ABC-01 backup tool and works with Moxa MXstudio.
Technical specifications
| Parameter | Specification |
|---|---|
| Ports (EDS-508A) | 8 x 10/100BaseT(X), RJ45, auto-negotiation, auto MDI/MDI-X |
| Layer-2 features | 802.1Q VLAN, port-based VLAN, GVRP, GMRP, IGMP v1/v2, QoS (802.1p/1Q, TOS/DiffServ), port trunking with LACP, port mirroring, RMON, bandwidth management |
| Redundancy | Turbo Ring v1/v2, Turbo Chain, STP, RSTP, MSTP |
| Security / management | HTTPS/SSL, SSH, TACACS+, RADIUS, IEEE 802.1X, port lock, SNMPv1/v2c/v3, DHCP Option 66/67/82, LLDP, DDM |
| Industrial protocols | EtherNet/IP and Modbus TCP; compatible with PROFINET for transparent data transmission |
| Switch properties | MAC table 8K, 64 VLANs, 256 IGMP groups, 1 Mbit buffer, 4 priority queues |
| Alarm / digital inputs | 2 relay outputs, 1 A at 24 VDC; 2 digital inputs, +13 to +30 V for state 1, -30 to +3 V for state 0, 8 mA max. |
| Power | 12/24/48 VDC redundant dual inputs, 9.6 to 60 VDC; 0.22 A at 24 VDC (0.30 A on MM/SS models); 2 removable 6-contact terminal blocks |
| Housing | Metal, IP30, 80.2 x 135 x 105 mm, 1040 g, DIN rail or wall mount |
| Operating temperature | Standard -10 to 60 deg C; -T models -40 to 75 deg C |
| Approvals as printed | UL 508, UL 60950-1, EN 62368-1; ATEX, Class I Division 2; DNV |
| MTBF / manufacturer warranty | EDS-508A: 1,105,486 hrs / 5 years |
Fibre and temperature variants
| Model | RJ45 ports | 100BaseFX ports | Typical distance |
|---|---|---|---|
| EDS-508A / -T | 8 | – | – |
| EDS-508A-MM-SC / -MM-ST (and -T) | 6 | 2 multi-mode, SC or ST | 4 km (OM1) / 5 km (50/125 um) |
| EDS-508A-SS-SC (and -T) | 6 | 2 single-mode, SC | 40 km, 29 dB link budget |
| EDS-508A-SS-SC-80 (and -T) | 6 | 2 single-mode, SC, 1550 nm | 80 km, 29 dB link budget |
Choosing and installing the EDS-508A
Use the eight-port copper model for panels with local devices and the fibre models for ring links between buildings or substations. Always compare the fibre link budget with total link loss plus dispersion penalty, and fit an attenuator on short single-mode links as the datasheet advises. The two power terminal blocks accept separate 12/24/48 VDC feeds for redundancy. Gigabit uplinks are not part of this series; if you need them, consider the Moxa EDS-G508E. Seven Star LLC, an independent supplier in Muscat, supplies the series; send the complete order code, including -T or -80 suffixes, with your enquiry. The manufacturer datasheet (version 1.8) is attached, and similar products are listed under Industrial Communications. Confirm the approvals you need for your project against the datasheet before ordering. For commissioning, ring roles are assigned by the DIP switches (Turbo Ring, Master, Coupler, Reserve) or by software, and the console cable DB9-to-RJ45 10-pin is in the box. The two digital inputs can report door contacts or external alarms through the switch, and the two relay outputs can drive a beacon or a PLC input when a port or power fault occurs. Keep a configuration backup on the ABC-01 tool so that a replacement unit can be loaded quickly, and note that the MTBF figure differs between copper and fibre models.
Datasheets & Documents
- Datasheet Moxa EDS-508A series datasheet v1.8 Download
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About brand
Since 1987 Moxa, based in New Taipei City, Taiwan, has built networking hardware for places where an office switch would fail: substations, wellhead panels, roadside cabinets. Seven Star LLC lists Moxa industrial Ethernet switches and fiber converters and supplies Moxa networking devices to system integrators and plant teams in Oman as an independent supplier. Each request is checked against the full Moxa model name before we quote.
Moxa switches and converters listed here
The EDS-G508E is a managed switch with eight Gigabit ports from the EDS managed line. The EDS-316-MM-SC-T is a 16-port unmanaged switch with 14 copper ports, two multi-mode SC fiber ports and the wide-temperature option (-40 to 75 C). The TCF-142-S-SC-T belongs to the TCF-142 series, which converts RS-232/422/485 serial signals to single-mode fiber. Moxa also makes serial device servers, protocol gateways, wireless devices and industrial computers, used on SCADA and telemetry networks across the GCC.
Ordering Moxa devices: what we need
The suffixes carry the specification. Send the complete model name, including fiber mode and connector (MM-SC, SS-SC, ST), the -T wide-temperature suffix and any coating or approval suffix. Add the power supply voltage, the SFP modules needed and the quantity.
Browse MOXA products by category: Industrial Communications.
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Frequently Asked Questions
Does the EDS-508A support MSTP?
Yes, STP, RSTP and MSTP are listed together with Turbo Ring v1/v2 and Turbo Chain.
What authentication methods are supported?
IEEE 802.1X, TACACS+ and RADIUS, plus HTTPS/SSL and SSH.
How many RJ45 ports on the fibre models?
Six 10/100BaseT(X) ports plus two 100BaseFX ports.
What does the SS-SC-80 variant add?
Two single-mode SC ports at 1550 nm for 80 km typical distance.
Does it have alarm outputs?
Yes: two relay outputs rated 1 A at 24 VDC and two digital inputs.
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